. Animal physiology. Physiology, Comparative; Physiology, Comparative. 486 ACT OF LEAPING, KANGAROO. and may be again projected. This is a kind of motion usually practised by many animals, whose structure is expressly adapted to it. Thus among Quadrupeds, we find several in which the hind legs are enormously elongated, for the purpose of giving greater quickness to the motion of the body ; and their muscles are develop- ed to an extraordinary de- gree, in order to supply the necessary force. This is the case among most of the animals of the order Rodentia, such as the Hare, Rabbit, Squir- rel,
. Animal physiology. Physiology, Comparative; Physiology, Comparative. 486 ACT OF LEAPING, KANGAROO. and may be again projected. This is a kind of motion usually practised by many animals, whose structure is expressly adapted to it. Thus among Quadrupeds, we find several in which the hind legs are enormously elongated, for the purpose of giving greater quickness to the motion of the body ; and their muscles are develop- ed to an extraordinary de- gree, in order to supply the necessary force. This is the case among most of the animals of the order Rodentia, such as the Hare, Rabbit, Squir- rel, &c. ; but particularly in the Jerboa or Jumping Rat, and in the Kangaroo and its allies. In these animals the fore feet, which are little used for. F.'G. 221—Kangaroos. progression, are compara- tively small; and in the last, they are less than half the length of the hinder limbs. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carpenter, William Benjamin, 1813-1885. London : Wm. S. Orr and Co.
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